[PATCH] sched: requeue_granularity

Change the granularity code to requeue tasks at their best priority instead
of changing priority while they're running.  This keeps tasks at their top
interactive level during their whole timeslice.
Signed-off-by: Con Kolivas <kernel@kolivas.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

kernel/sched.c

@@ -2398,10 +2398,8 @@ void scheduler_tick(int user_ticks, int sys_ticks)
 			(p->time_slice >= TIMESLICE_GRANULARITY(p)) &&
 			(p->array == rq->active)) {
 
-			dequeue_task(p, rq->active);
+			requeue_task(p, rq->active);
 			set_tsk_need_resched(p);
-			p->prio = effective_prio(p);
-			enqueue_task(p, rq->active);
 		}
 	}
 out_unlock: